include/scsi/scsi_transport_sas.h

   1 #ifndef SCSI_TRANSPORT_SAS_H
   2 #define SCSI_TRANSPORT_SAS_H
   3
   4 #include <linux/transport_class.h>
   5 #include <linux/types.h>
   6
   7 struct scsi_transport_template;
   8 struct sas_rphy;
   9
  10
  11 enum sas_device_type {
  12         SAS_PHY_UNUSED,
  13         SAS_END_DEVICE,
  14         SAS_EDGE_EXPANDER_DEVICE,
  15         SAS_FANOUT_EXPANDER_DEVICE,
  16 };
  17
  18 enum sas_protocol {
  19         SAS_PROTOCOL_SATA               = 0x01,
  20         SAS_PROTOCOL_SMP                = 0x02,
  21         SAS_PROTOCOL_STP                = 0x04,
  22         SAS_PROTOCOL_SSP                = 0x08,
  23 };
  24
  25 enum sas_linkrate {
  26         SAS_LINK_RATE_UNKNOWN,
  27         SAS_PHY_DISABLED,
  28         SAS_LINK_RATE_FAILED,
  29         SAS_SATA_SPINUP_HOLD,
  30         SAS_SATA_PORT_SELECTOR,
  31         SAS_LINK_RATE_1_5_GBPS,
  32         SAS_LINK_RATE_3_0_GBPS,
  33         SAS_LINK_RATE_6_0_GBPS,
  34         SAS_LINK_VIRTUAL,
  35 };
  36
  37 struct sas_identify {
  38         enum sas_device_type    device_type;
  39         enum sas_protocol       initiator_port_protocols;
  40         enum sas_protocol       target_port_protocols;
  41         u64                     sas_address;
  42         u8                      phy_identifier;
  43 };
  44
  45 struct sas_phy {
  46         struct device           dev;
  47         int                     number;
  48
  49         /* phy identification */
  50         struct sas_identify     identify;
  51
  52         /* phy attributes */
  53         enum sas_linkrate       negotiated_linkrate;
  54         enum sas_linkrate       minimum_linkrate_hw;
  55         enum sas_linkrate       minimum_linkrate;
  56         enum sas_linkrate       maximum_linkrate_hw;
  57         enum sas_linkrate       maximum_linkrate;
  58         u8                      port_identifier;
  59
  60         /* internal state */
  61         unsigned int            local_attached : 1;
  62
  63         /* link error statistics */
  64         u32                     invalid_dword_count;
  65         u32                     running_disparity_error_count;
  66         u32                     loss_of_dword_sync_count;
  67         u32                     phy_reset_problem_count;
  68
  69         /* the other end of the link */
  70         struct sas_rphy         *rphy;
  71 };
  72
  73 #define dev_to_phy(d) \
  74         container_of((d), struct sas_phy, dev)
  75 #define transport_class_to_phy(cdev) \
  76         dev_to_phy((cdev)->dev)
  77 #define phy_to_shost(phy) \
  78         dev_to_shost((phy)->dev.parent)
  79
  80 struct sas_rphy {
  81         struct device           dev;
  82         struct sas_identify     identify;
  83         struct list_head        list;
  84         u32                     scsi_target_id;
  85         /* temporary expedient: mark the rphy as being contained
  86          * within a type specific rphy
  87          * FIXME: pull this out when everything uses the containers */
  88         unsigned                contained:1;
  89 };
  90
  91 #define dev_to_rphy(d) \
  92         container_of((d), struct sas_rphy, dev)
  93 #define transport_class_to_rphy(cdev) \
  94         dev_to_rphy((cdev)->dev)
  95 #define rphy_to_shost(rphy) \
  96         dev_to_shost((rphy)->dev.parent)
  97 #define target_to_rphy(targ) \
  98         dev_to_rphy((targ)->dev.parent)
  99
 100 struct sas_end_device {
 101         struct sas_rphy         rphy;
 102         /* flags */
 103         unsigned                ready_led_meaning:1;
 104         /* parameters */
 105         u16                     I_T_nexus_loss_timeout;
 106         u16                     initiator_response_timeout;
 107 };
 108 #define rphy_to_end_device(r) \
 109         container_of((r), struct sas_end_device, rphy)
 110
 111
 112 /* The functions by which the transport class and the driver communicate */
 113 struct sas_function_template {
 114         int (*get_linkerrors)(struct sas_phy *);
 115         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 116         int (*get_bay_identifier)(struct sas_rphy *);
 117         int (*phy_reset)(struct sas_phy *, int);
 118 };
 119
 120
 121 extern void sas_remove_host(struct Scsi_Host *);
 122
 123 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 124 extern void sas_phy_free(struct sas_phy *);
 125 extern int sas_phy_add(struct sas_phy *);
 126 extern void sas_phy_delete(struct sas_phy *);
 127 extern int scsi_is_sas_phy(const struct device *);
 128
 129 extern struct sas_rphy *sas_rphy_alloc(struct sas_phy *);
 130 extern struct sas_rphy *sas_end_device_alloc(struct sas_phy *);
 131 void sas_rphy_free(struct sas_rphy *);
 132 extern int sas_rphy_add(struct sas_rphy *);
 133 extern void sas_rphy_delete(struct sas_rphy *);
 134 extern int scsi_is_sas_rphy(const struct device *);
 135
 136 extern struct scsi_transport_template *
 137 sas_attach_transport(struct sas_function_template *);
 138 extern void sas_release_transport(struct scsi_transport_template *);
 139 int sas_read_port_mode_page(struct scsi_device *);
 140
 141 #endif /* SCSI_TRANSPORT_SAS_H */